Inner tube for pneumatic tires.



J. H. BROWN.

1mm TUBE P0P. PNLUMTIG TIRES.

APPLICATION FILED NOV.24.1509.

956,;3gg. Patented May 3.1910.

UNITED STATES Pi-XTENT OFFICE.

JOHN H. BROXVN, OF ,VEST HOBOKEN. NEVJ JERSEY. ASSIGNOR TO BROVJ'N PEREECTION TUBE COMPAIJ Y.

INNER TUBE FOR PNEUMATIC TIRES.

Application led November :24. 192

Specification of Letters Patent.

atcntetl May 3, 19.10.

serial No. 529.738.

To Il whom 'it muy colzcun.'

lie it. known that l, Jona ll. liuowx. a

'citizen of the United States, and resident of ll'cst llohoken, in the county ot llutson i and Hiatt* of New .lerse \'.ha\`c invented new and usel'ui Improvements in lum-r lubes for Pneumatic Tires, of which the followinbr is a speeiliration.

rl`his invention relates to improvements in inner tubes for pneumatic tires and has for its object t0 provide an inner tube which will be extremely diflieult lo puncture when i .tube deflated, Fig. 3 is a similar View with the inner tube inflated, and Fig. t is a detail view in side elevation, partly in section1 ot' the tire with the inner tube in its dellatcd condition. l

The rim in connection with which thc pneumatic tiro is shown is dene. ed by l and may be of any well known or approved form. The easing 2 of the pneumatic tire may also be of any well known or approved construction.

The inner tube of elastic material, such as rubber compound, is denoted by 3 and it is provided with one or more layers which are so yconstructed that when the tube is inflated the material in the one or more layers will be compressed for resistingr punctures. In the present instance I have shown the outer portion ot the inner tube itself as being' circuinferentiallr depressed as shown at i and held in such depressed condition to form a cirrumfercntial depression 5 when the inner tube is deflated. by a eircumfereutialbinding strip 6 of substantially non-elastic flexible material, such, for instance, as a closely woven fabric, the side edges of which are permanent-ly united to the side walls of thevinner tube 3 along peripheral lines.

Vl' hen the inner tube is inflated, the outer non-extensible strip (i.

portion 4 ot' the inner tube will be com-- prtwed to z. 'reat deg-rta thus making it euri-mel) tlillirnh to puncture and capable ol iimm-liately Asealing;y the puncture when the foreign object producing the puncture is withdrawn. 'l`l-.e strip t. also serres as an additional protector l'or the outer portion 0f the inner tube. This inner tube maybe still further provided with :mother layer T of elastic material interposed between the inner wall 'it' the easing and the outer portion of the inner tulc l. rlhe side edges of this elastit` protecting strip l' are permanently tmitt-d to the side walls ot' the inner tube 3 either directly to the inner tubs or to the This elastie protectingr strip 7 is fulled laterally when applied to the inner tube in its normal condition s0 as to form a series of circumferential corrugations or wrinkles.

\\'heu the inner tube is inflated, the elastic material which forms the protecting strip i' will be laterally compressed between the bindiu; r strip t3 and the inner wall of the tire casing' .3 thus making the protecting strip extremely dillicnlt to puncture.

lt will be seen that b r forming an inner tube. :as herein shown and described. with either one or both layers of compressed material. when the tube is inflated, thc liability olpuncture. when in use is materially reduced thus addingr to thtl efficiency of the tire.

'ltat l claim is:--

l. ln combination. a restraining casing, an inflatable tube within the casingl and a substantially non-yielding strip of material permanently secured to the inrlatable tube along peripheral lines spaced apart, the portion otl the inflatable tube between said peripheral lines being;- normally in a non-compressed condition and havin;r a greater normal width than the width of the non-yieldin f r material between said lines and adapted to be 'fort-ed into the eircmnferential plane of the tube when the tube inflated.

ln combination. a restraining casing;` an intlatable tube within the easing. a substantially nonrichtingr strip of material permanently secured to the inflatable tube along peripheral lires spaced apart and a strip, of yielding material secured at. its edges along. peripheral lines exterior to the strip of nonyieldingr material. the portion ot inflatable tube between said peripheral lines and the portion of vn-Ming :strip bcwcen its linss of i my inwm'ion` I have signed my nnme 'in ntfznzhnwni buik hfwxng u grenier normal prvscncu nf two wilncsarcs, thisj 18th day of l0 nith than the Width of the non'yleldmg Novembcr 1909. v

material bem-'een said lines :1nd adapted to 1 ,v v lbe fmccrl into circnmferentinl planes'on the JOHN H' Bint N' 0111er and inner sides of the non-ylelding W'itnesses:

strip when the tube 1s infiated. F. immun BAvnzf,

In testimony, that I claim the foregoing :1S C. SUNDGREN. 

